<template>
    <div>
        <el-breadcrumb separator="/">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>商品分类</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图区 -->
        <el-card>
            <el-row>
                <el-col>
                    <el-button type="primary" @click="showAddDialog">添加分类</el-button>
                </el-col>
            </el-row>
            <!--表格  -->
            <tree-table class="treeTable" :data="catelist" :columns="columns" :selection-type="false" :expand-type="false"
                :show-index="true" index-text="#" border :show-row-hover="false">
                <!-- 是否有效模板 -->
                <template slot="isok" slot-scope="scope">
                    <i class="el-icon-success" v-if="scope.row.cat_deleted === false" style="color:lightgreen"></i>
                    <i class="el-icon-error" v-else style="color:red"></i>
                </template>
                <!-- 排序模板 -->
                <template slot="order" slot-scope="scope">
                    <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
                    <el-tag type="success" size="mini" v-else-if="scope.row.cat_level === 1">二级</el-tag>
                    <el-tag type="warning" size="mini" v-else>三级</el-tag>
                </template>
                <!-- 操作模板 -->
                <template slot="opt" slot-scope="scope">
                    <el-button type="primary" icon="el-icon-eidt" size="mini">编辑</el-button>
                    <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
                </template>
            </tree-table>

            <!-- 分页区域 -->
            <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange"
                :current-page="queryInfo.pagenum" :page-sizes="[3, 5, 10, 15]" :page-size="queryInfo.pagesize"
                layout="total, sizes, prev, pager, next, jumper" :total="total">
            </el-pagination>
        </el-card>
        <!-- 添加分类模板区域 -->
        <el-dialog title="添加分类" :visible.sync="addDialogVisible" width="50%" @closed="addCateDialogClosed">
            <el-form :model="addCateForm" :rules="addCateRules" ref="addCateFormRef" label-width="100px">
                <el-form-item label="分类名称：" prop="cat_name">
                    <el-input v-model="addCateForm.cat_name"></el-input>
                </el-form-item>
                <el-form-item label="父级分类：">
                    <!-- options用来指定数据源属性 -->
                    <el-cascader expand-trigger="hover" :options="parentCateList" v-model="selectedKeys" size="small"
                        :props="cascaderProps" :clearable="true" :change-on-select="true" @change="parentCateChanged">
                    </el-cascader>
                    <!-- <el-cascader v-model="selectedKeys" :options="parentCateList" :props="{ expandTrigger: 'hover' }"
                        @change="parentCateChanged"></el-cascader> -->
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addCate">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 编辑分类区域模型 -->
        <el-dialog title="修改分类" :visible.sync="editDialogVisible" width="30%">
           
            <span slot="footer" class="dialog-footer">
                <el-button @click="dialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="dialogVisible = false">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>

export default {
    data() {
        return {
            // 商品分类的数据列表
            catelist: [],
            queryInfo: {
                type: 3,
                pagenum: 1,
                pagesize: 5
            },
            total: 0,
            addDialogVisible: false,
            columns:
                [
                    {
                        label: "分类名称",
                        prop: "cat_name"
                    },
                    {
                        label: "是否有效",
                        type: "template",
                        template: "isok",
                    },
                    {
                        label: "排序",
                        type: "template",
                        template: "order",
                    },
                    {

                        label: "操作",
                        type: "template",
                        template: "opt",

                    }
                ],
            addCateForm: {
                cat_name: "",
                cat_pid: 0,
                // 分类的等级，默认是一级
                cat_level: 0
            },
            addCateRules: {
                cat_name:
                    [
                        { required: true, message: '请输入分类的名称', trigger: 'blur' }
                    ]
            },
            parentCateList: [],
            cascaderProps: {
                value: "cat_id",
                label: "cat_name",
                children: "children"
            },
            selectedKeys: [],

        }
    },
    created() {
        this.getCateList()
    },
    methods: {
        async getCateList() {
            const { data: res } = await this.$http.get('categories', { params: this.queryInfo })
            if (res.meta.sattus !== 200) {
                this.$message.error("获取商品分类失败")
            }
            this.$message.success("获取商品分类成功")
            console.log(res.data);
            this.catelist = res.data.result
            this.total = res.data.total;
        },
        //监听每页的条数pagesize
        handleSizeChange(newSize) {
            this.queryInfo.pagesize = newSize;
            this.getCateList()
        },
        // 监听pageNum的变化
        handleCurrentChange(newPage) {
            this.queryInfo.pagenum = newPage
            this.getCateList()
        },
        showAddDialog() {
            // 在展示框显示之前就得获取到对用的父级数据源
            this.getParentCateList()
            this.addDialogVisible = true
        },
        // 获取父级分类的数据列表
        async getParentCateList() {
            const { data: res } = await this.$http.get('categories', {
                params: { type: 2 }
            })
            if (res.meta.status !== 200) {
                return this.$message.error("获取数据失败")
            }
            console.log(res.data)
            this.parentCateList = res.data
            return this.$message.success("获取数据成功")
        },
        parentCateChanged() {
            if (this.selectedKeys.length > 0) {
                console.log(this.selectedKeys.length - 1);
                this.addCateForm.cat_pid = this.selectedKeys
                [this.selectedKeys.length - 1]
                this.addCateForm.cat_level = this.selectedKeys.length
                return
            } else {
                this.addCateForm.cat_pid = 0
                this.addCateForm.cat_level = 0
            }
            console.log(this.selectedKeys)
        },
        async addCate() {
            const { data: res } = await this.$http.post('categories', this.addCateForm)
            if (res.meta.status !== 201) {
                return this.$message.error("创建分类失败！")
            }

            this.$message.success("创建分类成功！")
            this.getCateList()
            this.addDialogVisible = false
            // console.log(this.addCateForm);
        },
        addCateDialogClosed() {
            // this.$refs.addCateFormRef.resetFields()
            this.addCateForm = {}
            this.selectedKeys = []

        }
    }


}

</script>

<style scoped>
.treeTable {
    margin-top: 15px;
}

.el-cascader {
    width: 100%;
}
</style>